That set up at Narromine would be more affected by weather and age than any other cause, I Doubt it would ever have been over stressed until weakened. How much Lift is Possible. ??? Easily calculated C/L A o A Wind speed and wing area. Easily 2-3 times the weight of the Plane I would suggest. As for stress on the cable, quite a few factors come into Play How straight it is when the cable becomes tensioned? How Jerky the Load is and how large the Planes inertia when it's jumping about in the wind. A quantity in Proportion to it's Mass. Nev